1.\" -*- nroff -*- 2.\" 3.\" Copyright (c) 2000 Alexander Langer 4.\" 5.\" All rights reserved. 6.\" 7.\" This program is free software. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 18.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR 19.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 22.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd May 18, 2000 32.Dt BUS_RELEASE_RESOURCE 9 33.Os 34.Sh NAME 35.Nm bus_release_resource 36.Nd release resources on a bus 37.Sh SYNOPSIS 38.In sys/param.h 39.In sys/bus.h 40.Pp 41.In machine/bus.h 42.In sys/rman.h 43.In machine/resource.h 44.Ft int 45.Fn bus_release_resource "device_t dev" "int type" "int rid" "struct resource *r" 46.Sh DESCRIPTION 47Free a resource allocated by 48.Xr bus_alloc_resource 9 . 49The resource must not be in use on release, i.e., call an appropriate function 50before (e.g.\& 51.Xr bus_teardown_intr 9 52for IRQs). 53.Bl -item 54.It 55.Fa dev 56is the device that owns the resource. 57.It 58.Fa type 59is the type of resource that is released. 60It must be of the same type you allocated it as before. 61See 62.Xr bus_alloc_resource 9 63for valid types. 64.It 65.Fa rid 66is the resource ID of the resource. 67The 68.Fa rid 69value must be the same as the one returned by 70.Xr bus_alloc_resource 9 . 71.It 72.Fa r 73is the pointer to 74.Va struct res , 75i.e., the resource itself, 76returned by 77.Xr bus_alloc_resource 9 . 78.El 79.Sh RETURN VALUES 80.Er EINVAL 81is returned, if the device 82.Fa dev 83has no parent, 84.Dv 0 85otherwise. 86The kernel will panic, if it cannot release the resource. 87.Sh EXAMPLES 88.Bd -literal 89 /* deactivate IRQ */ 90 bus_teardown_intr(dev, foosoftc->irqres, foosoftc->irqid); 91 92 /* release IRQ resource */ 93 bus_release_resource(dev, SYS_RES_IRQ, foosoftc->irqid, 94 foosoftc->irqres); 95 96 /* release I/O port resource */ 97 bus_release_resource(dev, SYS_RES_IOPORT, foosoftc->portid, 98 foosoftc->portres); 99.Ed 100.Sh SEE ALSO 101.Xr bus_alloc_resource 9 , 102.Xr device 9 , 103.Xr driver 9 104.Sh AUTHORS 105This manual page was written by 106.An Alexander Langer Aq alex@big.endian.de . 107